Project View should allow for more control and organization

In the Projects view, one sees the list of files in a list. It would be nice to be able to have more control over how these are displayed, eg to be able to create folders and put arbitrary projects files into them.

In general I have too many files in each project for it to be convenient to view them all in a "flat" list/tree. Half the files are from others, and I use them without needing to edit them. Of these I just need half so that my project complies and I don't ever need even to look at them. Others I'm currently editing a lot. I'd like to be able to sort such files into folders so that the ones I don't need to look at much aren't "getting in the way", and the ones that I am are immediately visible.

You should be able to edit this structure in the Project View and the project files should be created and configured automatically to reflect these changes.